LDN - Luminis Developer Network

*Example debug code*

package uk.ac.nottingham.compass.channels.wizzy;

...
import org.apache.log4j.Logger;
...
...

public class CSuperWizzyChannel extends NottinghamBaseChannel {

    	private static Logger _logger = Logger.getLogger( 
    		CSuperWizzyChannel.class.getName() 
    	);
	...
	...
	...
	public void exampleMethod(){
	
           // Note: Add the method name to the start of each message
           _logger.warn( "exampleMethod(): This is a warn message"); 
           _logger.error("exampleMethod(): This is a error message");
           _logger.info( "exampleMethod(): This is a info message");
           _logger.debug("exampleMethod(): This is a debug message");

	}
	...
	...
	...
}

When you need to debug a particular class/package...

Backup, then edit $CP_ROOT/webapps/luminis/WEB-INF/config/cplog4j.properties

Add the lines...

# cczdas - Debug for Super Wizzy Channel
log4j.category.uk.ac.nottingham.compass.channels.wizzy.CSuperWizzyChannel=DEBUG, file

then
tail -f $CP_ROOT/logs/cp.log

When you're done, remove/comment out the class/package in $CP_ROOT/webapps/luminis/WEB-INF/config/cplog4j.properties

*If you want to be extra fancy*, you could add your own log file for this particular channel...

So instead add (something like)...

## cczdas: Extra logging for wizzy channel ############################
log4j.category.uk.ac.nottingham.compass.channels.wizzy.CSuperWizzyChannel=DEBUG, wizzy
log4j.additivity.wizzy=false
## NB additivity=false so only doing this logging in wizzy.log BUT errors also appear in ROOT cp.log

log4j.appender.wizzy=org.apache.log4j.RollingFileAppender
log4j.appender.wizzy.File=${util.logservice.log4j.directory}/wizzy.log
log4j.appender.wizzy.MaxFileSize=1MB
log4j.appender.wizzy.MaxBackupIndex=5
log4j.appender.wizzy.layout=org.apache.log4j.PatternLayout
log4j.appender.wizzy.layout.ConversionPattern=%d{ISO8601} %x %m%n
#######################################################################

to $CP_ROOT/webapps/luminis/WEB-INF/config/cplog4j.properties